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Finding the Fourth Proportional to 281,194.80, 421,779.90 and 81,510.84

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Solution

The fourth proportional to 281,194.80, 421,779.90 and 81,510.84 is: 122,262.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,194.80 : 421,779.90 = 81,510.84 : x
  2. Step 2: Convert to fraction form
    281,194.80/421,779.90 = 81,510.84/x
  3. Step 3: Cross multiply
    281,194.80x = 421,779.90 × 81,510.84
  4. Step 4: Simplify right side
    281,194.80x = 34,379,633,944.12
  5. Step 5: Solve for x
    x = 34,379,633,944.12/281,194.80
  6. Step 6: Final answer
    x = 122,262.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.